I dont remeber what happed to the enigma force but basically The planet he took control of captured Hiro-Kala when he used his oldstrong ability and merged him with his planet, restoring the planet and the world-mind or whatever it was flew back to where it came from. They left the possibility of Hiro of coming back but its highly unlikely. Basically the hulks tried to save him and redeem him but he stated he couldnt be redeemed and it was to late. The visions of his mother that he had during and after the War with Galactus were all just delussional visions he had that never really happened